Visual colorimetric detection of tin(II) and nitrite using a molybdenum oxide nanomaterial-based three-input logic gate
Visual colorimetric detection of tin(II) and nitrite using a molybdenum oxide nanomaterial-based three-input logic gate
复制标题
使用基于氧化钼纳米材料的三输入逻辑门对锡 (II) 和亚硝酸盐进行视觉比色检测
DOI：
10.1007/s00216-018-1109-4
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发表时间：
2018-07-01
影响因子：
4.3
通讯作者：
He, Yi
中科院分区：
文献类型：
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作者：
Du, Jiayan;Zhao, Mengxin;He, Yi
我们报道了一种基于氧化钼（MoO3）纳米材料的三输入逻辑门，它使用Sn2+、NO2（-）和H+离子作为输入。在酸性条件下，Sn2+能够还原MoO3纳米片，生成富氧空位的MoO3-x纳米材料，并伴有强局域表面等离子体共振（LSPR）和强烈的蓝色溶液作为输出信号。当引入NO2（-）时，MoO3纳米片与Sn2+之间的氧化还原反应被强烈抑制，因为NO2（-）同时消耗H+和Sn2+。采用三输入逻辑门进行不同输入状态下Sn2+和NO2（-）的视觉比色检测。比色法对Sn2+的检出限和NO2（-）的最低检出浓度分别为27.5 nM和0.1 μ M。该试验可以目测Sn2+和NO2（-）的浓度分别低至2 μ M和25 μ M。通过对几种水源中Sn2+和NO2（-）的检测，证明了逻辑门比色法的适用性。
We report a molybdenum oxide (MoO3) nanomaterial-based three-input logic gate that uses Sn2+, NO2 (-), and H+ ions as inputs. Under acidic conditions, Sn2+ is able to reduce MoO3 nanosheets, generating oxygen-vacancy-rich MoO3-x nanomaterials along with strong localized surface plasmon resonance (LSPR) and an intense blue solution as the output signal. When NO2 (-) is introduced, the redox reaction between the MoO3 nanosheets and Sn2+ is strongly inhibited because the NO2 (-) consumes both H+ and Sn2+. The three-input logic gate was employed for the visual colorimetric detection of Sn2+ and NO2 (-) under different input states. The colorimetric assay's limit of detection for Sn2+ and the lowest concentration of NO2 (-) detectable by the assay were found to be 27.5 nM and 0.1 mu M, respectively. The assay permits the visual detection of Sn2+ and NO2 (-) down to concentrations as low as 2 mu M and 25 mu M, respectively. The applicability of the logic-gate-based colorimetric assay was demonstrated by using it to detect Sn2+ and NO2 (-) in several water sources.